import java.util.Arrays;
public class Complex{
    //测试charAt
    public static char charAt(String str, int i) {
        return str.charAt(i);
    }
    public static char getcharAt(String str, int i) {
        return charAt(str, i);
    }
    //测试split
    public static String[] split(String str) {
        String[] strsort = str.split(":");
        return strsort;
    }
    public static String[] getsplit(String str) {
        return split(str);
    }
    //测试sort
    public static String[] sort(String[] str3) {
        Arrays.sort(str3);
        return str3;
    }
    public static String[] getsort(String[] str3) {
        return sort(str3);
    }
    //测试binarySearch
    public static double[] binarySearch(double[] str4) {
        Arrays.sort(str4);
        return str4;
    }
    public static double[] getbinarySearch(double[] str4) {
        return binarySearch(str4);
    }

}
